You are mistaken.
Aspirin kills about 5,000 people a year.
One ounce of 50 ppm colloidal silver is safe to drink. Many people do for colds or for other health reasons.
I could treat about 20 plants with that amount.
Colloidal silver is very safe when used properly.
Here's an idea: Why don't you go and drink one ounce of the fertilizer you use on your plants and see how safe it is? (don't do that)
asprin is the safest of the three and it works. With asprin you can use the scraps, with CS you can't use any of it but the reversed pollen.
You are mistaken.
The sprayed parts of a plant will be male, so you would not want to use them any way.
If you do not get any spray on the rest of the plant, it is safe to use.
The sprayed parts may be safe anyway. As I said, it is safe to ingest an ounce of 50 ppm colloidal silver. The sprayed plant will have a much smaller amount on it than that. there are people who inhale vapors of colloidal silver for health reason.
I would not advocate using parts of a plant sprayed with colloidal silver, just to err on the side of caution. Personally, I spray the entire plant to maximize pollen production. The whole plant has male flowers and is therefore useless.
If you still want to use CS. It's $14
http://www.vitaminlife.com/product-exec/PNAME/Colloidal-Silver-30-PPM-/product_id/41016 and you get 8OZ. Tiresias Mist is 1 OZ and has a higher price tag. Asprin will run you 25cents.
Aspirin is not as effective, not even close. If it is cost that worries you, you can produce colloidal silver for much cheaper than you can purchase aspirin.
I buy Tiresias Mist for $20. I do not want to waste time producing colloidal silver. You can always go out and get more money. You can not go get more time.
For $20 I produced thousands of feminized seeds that would cost about $15 each if ordered online.
That seems like a great deal to me.